I/O (Sterndrive) Conversion to Outboards

[redneck joe]

Ted, leave room for fairing

Remind us neophytes what fairing is.

 

[Pmt133]

Its that thing people do to experience the Renaissance but with modern amenities.

 

[Scott Danforth]

Fairing is the correct term for slapping body filler on the fiberglass and making it ssmmmmoooooottthhhhhh

 

[redneck joe]

Its that thing people do to experience the Renaissance but with modern amenities.

I did that in Tampa a couple years ago and since my wife was not with me she could not stop me from buying the kilt.

 

[redneck joe]

 

[tpenfield]

Fairing is the correct term for slapping body filler on the fiberglass and making it ssmmmmoooooottthhhhhh

In search of flatness. . . .

OK, the transom as it is now is not very flat.
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Most likely from lamination overlaps, etc.

I am not sure fairing compound (I have a source for VE fairing compound), is the right thing for the mounting area of the outboard. . . but maybe it is.

'Plan B' would be to take a 'flat' piece of something, bigger than the OB mount footprint, and mix up some fiber-strand paste and use the flat piece as a 'surface mold' to give a nice flat area, just where needed.

I think I would need about a 20"x15" piece of flatness based on the engine mount footprint.
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Thoughts?

 

[tphoyt]

I like the fiber strand plan over the faring compound alone.

 

[Pmt133]

Do they have a measurement for how flat it needs to be like the I/Os?

 

[Scott Danforth]

Ted, make some PB and use that to fair the surface vs micro-spheres

your fiberglass shop will also have kitty hair or tiger hair

 

[tpenfield]

Do they have a measurement for how flat it needs to be like the I/Os?

Do they have a measurement for how flat it needs to be like the I/Os?

I believe the I/O spec is thickness and how 'parallel' the inside & outside surface need to be.

I'm trying to find what outboard motors need, but I would imagine it mainly applies to the outside surface.

 

[Scott Danforth]

I believe its supposed to be flat within 1.5mm over a 1 meter length (with a straight-edge). but that is memory.

then I recall a 3mm parallel requirement (which doesnt make sense for parallel)

I would want the transom flat where the motor clamp sits on the outside from a loading standpoint.

 

[redneck joe]

Just more fiberglass seem to be sensible? Why use a non structural filler?

 

[Pmt133]

Just send it. What could possibly go wrong...